David,
Our customer requested that the Power Supply comply to Section
9.10.6 of the GR-1089-Core Specification.
Mark Pascarelli
Electrical Engineer
Carlo Gavazzi, Inc.
-Original Message-
From: David Heald [SMTP:davehe...@mediaone.net]
Sent: Tuesday, November 27, 2001 9:52 AM
To: Mark Pascarelli
Cc: 'emc-pstc'
Subject:Frame Surge Test applicability
Mark,
Is this section applicable to your product? Section 9.10 only
applies
to equipment that was formerly installed in an IBN system (now in a
CBN), and newer products rarely fall into this category. At my last
job, I performed a lot of GR-1089 evaluations and >95% of the
products
were exempt from 9.10. The only products I saw that fell into this
category was some old 80's era boxes that had new cards to allow
updated
functionality (almost impossible to get them EMI compliant due to
the
initial design for LOW bandwidth & isolated shield grounds, but we
got
it.)
Best Regards,
Dave
Mark Pascarelli wrote:
>
> Hi all,
>
> I am trying to re-design our current power supply to meet
GR-1089-Core
> Specification.
> The Power Supply has a -48V input and 5VDC/100W, 5VDC/100W and
12VDC/150W
> Output.
>
> Based on current testing, we did not comply with Section 9.10.6
Frame Surge
> Test.
> This test applies a surge current as defined in IEEE C62.41. The
filter
> capacitor was destroyed during this test. The capacitor is rated
at 100V. I
> think this capacitor should be replaced with a higher voltage X or
Y
> capacitor. Possibly a GDT or TVS is required.
>
> If anyone can help, I will email a portion of the schematic in PDF
format.
>
> Thank you,
>
> Mark Pascarelli
> Electrical Engineer
> Carlo Gavazzi, Inc.
>
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